SN74ALS251DR Equivalent & Substitute Parts

Part Overview

The SN74ALS251DR is a Logic Multiplexer IC manufactured by Texas Instruments, configured as a 1 x 8:1 multiplexer in a 16-SOIC surface mount package. This component is classified as Active product status and is RoHS3 compliant. The SN74ALS251DR serves applications requiring single-channel 8-to-1 data selection in digital logic circuits. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range.

Substiute Parts

SN74ALS251DR

Texas InstrumentsIn Stock: 932SN74ALS251DR Datasheet

Current PartRFQ

SN74ALS151DR

Texas InstrumentsIn Stock: 2752SN74ALS151DR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The SN74ALS151DR qualifies as a parametric equivalent to the SN74ALS251DR based on the following substitution criteria:

Matching Parameters:

• Identical circuit configuration: 1 x 8:1 multiplexer
• Identical package type: 16-SOIC (0.154", 3.90mm Width)
• Identical mounting type: Surface Mount
• Identical voltage supply range: 4.5V ~ 5.5V
• Identical output current specifications: 2.6mA (High), 24mA (Low)
• Identical operating temperature range: 0°C ~ 70°C
• Identical RoHS compliance: RoHS3 Compliant
• Identical MSL rating: 1 (Unlimited)
• Same manufacturer: Texas Instruments
• Same series: 74ALS

The SN74ALS151DR maintains full electrical and mechanical compatibility with the SN74ALS251DR across all specified parameters, enabling direct substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the SN74ALS251DR and SN74ALS151DR are Active product status components from Texas Instruments. Both parts maintain RoHS3 compliance and REACH Unaffected status, meeting current environmental and regulatory requirements. Selection between these parts may be based on inventory availability, lead time, or supply chain considerations, as electrical and mechanical parameters are identical. The SN74ALS151DR currently maintains higher inventory levels (2642 Pcs) compared to the SN74ALS251DR (915 Pcs), which may influence procurement decisions for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS151DR be used as a direct replacement for the SN74ALS251DR?

A: Yes. The SN74ALS151DR is a parametric equivalent with identical electrical specifications, output current ratings, voltage supply range, operating temperature range, and 16-SOIC package configuration. Direct substitution is supported without circuit modification.

Q: Are there any differences in pin configuration between these parts?

A: No differences are specified in the provided parameters. Both parts use the 16-SOIC package with identical dimensions (0.154", 3.90mm Width) and are surface mount components.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SN74ALS251DR and SN74ALS151DR are RoHS3 compliant, REACH Unaffected, and carry MSL rating 1 (Unlimited), meeting identical environmental and regulatory requirements.

Q: What is the basis for substitution between these parts?

A: Substitution is based on matching circuit configuration (1 x 8:1 multiplexer), identical electrical parameters (voltage supply, output current, operating temperature), package type (16-SOIC), and compliance certifications. All specified parameters are equivalent between the two parts.

Q: Are there inventory or availability considerations?

A: The SN74ALS151DR has higher current inventory availability (2642 Pcs) compared to the SN74ALS251DR (915 Pcs). Both parts are listed as Active product status from Texas Instruments.